3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $result = hash('sha256', 'hello'); $mutated = mutate($result); $unmutated = unmutate($mutated); echo "hello in sha256 is $result. Mutated it becomes $mutated, and when unmutated it is returned to $unmutated"; function mutate($hash) { return str_replace(['a', 'b', 'c', 'd', 'e', 'f'], ['f', 'e', 'd', 'c', 'b', 'a'], $hash); } function unmutate($hash) { return str_replace(['f', 'e', 'd', 'c', 'b', 'a'], ['a', 'b', 'c', 'd', 'e', 'f'], $hash); }
Output for 5.4.0 - 7.1.0
hello in sha256 is 2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824. Mutated it becomes 2ca24cba5ab0a30b26b83b2ac5b9b29b1b161b5c1aa7425b73043362938b9824, and when unmutated it is returned to 2df24def5fe0f30e26e83e2fd5e9e29e1e161e5d1ff7425e73043362938e9824
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[', expecting ')' in /in/Wdla3 on line 14
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[', expecting ')' in /in/Wdla3 on line 14
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/Wdla3 on line 14
Process exited with code 255.